Assertion: Rusting of iron is endothermic in nature.
Reason: As the reaction is slow, the release of heat is barely evident.
a) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
b) Both Assertion and Reason are true, but Reason is NOT the correct explanation of Assertion.
c) Assertion is true, but Reason is false.
d) Assertion is false.